This is just a small suggestion, one that (I hope) would not require re-working the whole game. Is there any compelling reason why there couldn't be a credit balance display on the Cargo page, just as there is on the Buy, Sell, and Ammo pages? This would save having to keep hitting another tab just to figure what your current cargo trade just netted you.
Morrigan

Give this player some credit(s), this makes *cents*. :-D